What am i supposed to do with my 500 gig WD HDD randomly disappearing ? I am sure it happened right after the 0902 BIOS flash, but no amount flashing back and forth is solving it.The CMOS Clock is also getting reset randomly....Time to replace the CMOS battery with a fresh one?

PS: When the HDD does get detected, its as good as anything - tested thoroughly in Windows and no bad sectors, nothing.Good speeds too....